Two roadway design are under consideration. Design 1A will cost $3 million to build and $100,000 per year to maintain. Design 1B will cost $3.5 million to build and $40,000 per year to maintain. Both designs are assumed to be permanent. Use an AW based rate of return equation to determine (a) the breakeven ROR, and (b) which design is preferred at a MARR of 10% per year